Step All The Way Back
We've all had this experience. You're in the middle of your pre-shot routine - setting your feet, waggling, double-checking your aim - and just as you're about to pull the trigger, a car horn honks. It's even more unsettling when you're standing over a putt.
When that happens, there's only one thing to do. Abort your mission - stop the countdown to impact, and start again from the beginning. Don't just raise up from your crouch over the ball - step all the way back. On occasion, I've gone so far as to actually put the club back in my bag, just so that I could 'take it from the top'. This is the only way to regain the rhythm, comfort, and confidence that are necessary as you prepare to hit any shot.